Reinforcement for concrete girders, &amp;c.



PATENTED MAY l5, 1906.

s. H. WOODRUFP. REINFORCEMENT Foa CONCRETE G-IRDERS, &o.

lax/611%);

APPLICATION FILED FEB. 1. 1906.

' end hoe for the ohie W ll lhl till lll' ll'tl ltll t'l i l Agiplicmtiou filed February l, 1906. Serial N4,

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ll 'l l/hoitinow, FJ,/etee, residing at r of Tllrie and Stote of e, new and motel mitoreemol'ite for lilon erete lfflirllors, L owe, the. of which the lollowing is eeooi'ziiieatti.

'lhie iii'lvehtion reiot IILQEI'C for (nine-into girder home it rmty some e e; ALOH of t 1e ll Blitz-Lilo, 1n the com New Iork, time int ling'irovement in lite l to e motel reinlore e him-1n e and the liho, k f to oreii 'o lenehy the greatest furnisl'ied" lior the Whieh can he iiopoi l iorael Finn l h one *enoe indieote corresponding ports 'tliironghout the so v'eral views.

A represents the girder, beam, root, ilOOlj-z main port of the rod, so as to form lugs or hooks c, which when embedded or anchored in the concrete assist in holding the rod against lei'igthwiee displacement in the girder.

In the upper part of the girder or been] is arranged it compression member, rod, or bar I), which extends lengthwise throughout the some and is provided at its ends with doWnwordly-projeating hooks or lugs d, whioh are embedded or anchored in the cone-rote and.

it'll til tllpeeificetion of l" it portion g, t lb, Will-oh from oppo hocistontel lioi'tioii ol ing the new she rii'lg m: ooireet'londii i myth in Her l member: V

in :teseinhiin [[lflll'l loenihein ol in. eoneiete remit (meet the l" the lower ehellrn tween the (5011" member and th the upper. hm ing nie'inhe' per llOl'lZUlllnl e m beta sheoriiig member ll t he ends of the oomph) ends of the lower shearing; momher, whereby these ports are reliably held :winei endwiee o1 longitudinal alisjilztt'enient relatively to each other.

It Z in m represent it plurality ot vertiml etilruwi'whieh are arranged in :1, horizontal row tl'iroughout the length ol' the main rein forcing; memhel'e or here. These etirrnpe are secured to the tension and compression menihers and t upper and lower llOl'lZlOllllltl .lllmlira iit il -r parts of the shearing members by winding the ends of the stirrups around the same. The central stirrups 7c wrapped or wound at their upper ends only around the con'ipression member, while their lower ends are wra ped or wound around the central parts of t e tension member and the central .iorizontal parts of the upper and lower shearing members. The outer stirrups Z are wrapped or wound at their lower ends only around the tension member, while their upper ends are wrapped or wound around the end portions of the compression member and upper and lower shearing members. The inner intermediate stirrups m are connected at their upper ends only with the compression member, while their lower ends are wound or wrapped around the tension member and the adjacent lower horizontal part of the lower shearing member, while the middle parts of these stirrups are secured to, the adjacent inclined portions of the upper shearing member by wire ties 0. The outer intermediate stirrups n are wound or wrapped at t eir lower ends only around the tension member and at their upper ends around the compression member and upper horizontal ends of the upper shearing member, while their central parts are secured by wire ties p to the inclined portions of the lower shearing member. This reinforcement as a whole can be erected complete on the ground or in the blacksmithshop, where this work may be done more easily quickly, and cheaply, permitting of embedding the same into the beam orgirder for which it is intended without requiring any further attention from an iron-worker and enabling the work to be completed solely by the laborers, thereby avoiding an unnecessary number of men around the work, whereby the progress of the work is facilitated and the cost thereof reduced. accordingly. My improved concrete reinforcement has its several parts so constructed that they are reliably held in place relatively to each other and operate con jointly to resist any destructive force to which the beam, girder, or other con crete body in which the same is embedded may be subjected. By turning the hooks of the tension member upwardly and those of the compression and shearing members downwardly the reinfm'cement not only can be handled more freely without liability of catching against objects, but the mass of concrete at the ends of the girder by this means is .SBCUFGl] interlocked with all of the reinforcing members, thereby obtaining the maximum strength in the girder or beam with a minimum use of metal.

When the concrete beam or girder which is to be reinforced is comp atiy I is only necessary to empby a s V nforcing structure of the descriool :er, as shown in Figs. 2 and 3; but if the beam or girder is of considerable width or designed to sense.

W the load to which the beam or girder 7c is to be subjected is more moderate than that for which the reinforcement shown in Figs. 1 2, and 3 is intended, the upper heavy longitudinal compression rod or member and the central stirrups may be omitted and comparatively small compression rods or wires q may be arranged lengthwise above the horizontal upper parts of the u per shearing member and extended from tlie outer ends thereof to a point vertically in line with the ends of the central horizontal portion of the upper shearing member, as shown in Fig. 5. Vi hen thus used, the small wires 1 serve principally as a means for holding the inner stirrups in place at their upper ends while packing the concrete around the same; but they also serve in a measure as compression mem bers.

il hen only a single set of tension and shearing members is employed, it is only nec- 9o essary to employ a single set of stirrup-re taming wires g, as shown in Fig. 6; but if two sets of tension and shearing members are employed, as would be the case when reinforcing comparatively wide girder, then the 9 5 number of retainingwires g is increased correspondingly, as shown in Fig. 7.

When the reinforcement is applied to the girder or beam in a roof, the compression member maybe elevated at the center and in-,

clined toward both ends in conformity with the inclination of the roof, as shown in Fig. 1 but when the reinforcement is applied to the girder or beam' of a straight floor the compression member may be madestraight to I05 conform to the floor. In Fig. 5 the reinfrucement is represented in the girder of a floor, and the retaining-wires and end portions of the shearing members have therefore been shown horizontally accordingly.

I claim as my invention 1. A reinforcement for concrete girders, beams, 850., comprising a lower horizontal tension-rod, and upper and lower shearingrods each having a .ower central horizontal I15 part, inclined parts extending upwardly and outwardly from opposite ends of the central part and upper horizontal partsextendingoutwardly from the ends of said inclined parts,

the lower horizontal part of the lower shear- I20 ing-rod being longer than that of the upper shearingrod and interposed between the same and the central part of the tension-rod and the horizontal ends of the upper shearing-rod being longer than those of the lower I25 shearing-rod and arranged above the same, substantially as set forth.

2. A. reinforcement for concrete girders, beams, 8:0, comp-rising a lower horizontal tension-rod, upper t nd lower shearing-rods, I 0

iii

llfdlldltlh each having a lower central horizontal part, inclined parts extendii'ig upwardl'y'and outwardly from opposite ends of the central part and upper horizontal parts extending outwardly from the end of said inclined parts, the lower horizontal part of the lower shear ing-rod being longer than that of the upper shearing-rod and interposed between the same and the central part of the tension-rod and the horizontal ends of the upper sheari11grod being longer than those of the lower shearing-rod and arranged above the same, moans l'or connecting the central parts of the tension-rod, upper shearing-rod and lower shearing-rod, and means for coin'iecting the horizontal end portions of the upper and lower shearing-rods, substantially as forth.

A reinforcement for concrete girders, heains, 860., comprising a lower horizontal tcnsionrod, upper and lower shearing-rods each having a lower central horizontal part, inclined parts extending upwardl and outwardly from opposite ends of the central part and upper l'iorizontal. parts extending outwardly from the ends of said inclined. parts, the lCWl/Q'l horizontal part ol the lower shearing rod being longer than that of tho upper shearing-rod and interposed between the same and the central part of the tei'ision-rod andv the horizontal ends of the upper shearing-rod being longer than those of the lower shearing-rod and. arranged above the same, and upright wire stirrups wound at their lower ends around said tension.--rod and lower horizontal parts of said shoaringrods and at their upper ends around the horizontal end parts o'f'tlie upper and lower shearingqods, substantially as set forth.

4. A reinforcement tor concrete girders, beams, 6100., comprising a lower horizontal tension-rod, upper and lower shearing-rods each having lower central horizontal part, inclined parts extending upwardly and out,- wardly from opposite ends ol the central part and upper horizontal parts extending outwardly from the ends of said inrliiiod parts, the lower horizontal part of the lower shoan inga'od heing longer than that ol' the upper shearing-r0d and interposed between tho same and the central part o.,l' the ten and the horizontal ends of the upper shear lug-rod,

heing longer than those oi the lower sl'ioaring-rod and arranged ahovo the same, an upper comhrossi m-ro l, and upright stirrups secured at their lower ends to said tension-rod and lower parts ol the Sl1i5z1-I.ill l'u(lr-3 while their upper ends are scoured to the ends of tho shearing-rods and to said upper oomprcssiomrod, substantially as .set l'ortlu on -roll 1 5. ll reinforcement for concrete girders, heains, ill-0., GOIOPl'lSiDg a lower horizontal tension-rod, an n per horii'tontal cornpression-rod, upper and lower sl1earing-rods each having a lower central. horizontal part, inclined intermediate parts which extend n J- wa-rdly and outwardly from the opposite on s ol the central part and horizontal end parts which extend outwardly from the upper ends of the inclined parts, the horizontal lower part of the lower shearing-rod being longer than. that oil the upper shearing-rod and in" terposeiil between the same and the tensionrod and the end parts of the upper shearing rod being longer than the corresponding parts of the lowershearing-rod and into posed between the same and the upper compressionrod, an d up right 5 tirru ps wound a 1; their lower ends around the tension-rod and the horizontal lower pars of the shearing-rode while their upper ends are WOlllHl around the oo1npression-rod and horizontal end parts of the shearingaods, substantially as forth.-

6. A reinforcoinmit for concrete girders, heanis, &o., comprising lower horizontal tensionn'od, an upper horizontal mnupression-rod, upper and lower sliezu'ingo'ods each having a lower centrz'il horizontal part, inclined intermediate parts which extend upwardl and outwardly from opposite ends of the central part and horizontal end parts which extend outwari'lly from the upper ends of the inclined parts, the horizontal lower part ol the lower shoaringa'od being longer than that of the upper shearing-rod and interposed between the same and the tenslonrod andtho end parts of the upper shearingrod being longer than the mirrospondinp; parts of the lower shearing-rod and interposed between the 5514110 and the upper'conun'ession-- rod, upright stirrups wound at their lower ends around the tens1on-rod and the horizontal lower parts of the shoaringo'ods while their upper ends are wound around the comprossionwr l and horizontal ond parts of the shearing-rods, iipwzu'dly-turned hooks arranged. at the ends of tho tvnsiororod, and downwardly-turimd hooks arranged at the ends ol comprossion-rod and the shearing rods, the hooks ol the upper shcaringood hcingi; arranged hotwcon those oi the coinprosshin-rod and the lower sliearing' rml, suh- 'z'tially as set l'orth.

d. noes my hand this Zllnt day ol Ja'nuairy, W015.

(HUN lC-Y ll ll lilllltlll l IIO 

